An interesting article at Ars Technica takes a look at some compelling data (the longer-than-normal processor update cycles in Apple's personal computer lineup) and speculates that Apple's enthusiasm for its partnership with Intel might be cooling. Like Apple's soured relationship with once-BFF Google, this may be the result of Intel's increasing activities in the mobile computing space.

It's possible Apple might start buying AMD chips, though thinking about it with AMD's market cap of $5-6bn and Apple's cash reserves of $40bn+, they might just buy AMD outright

Thanks for the most obvious proof that you don't read articles.
The ArsTechnica article goes through great lengths to argue why using AMD CPUs is only remotely possible under one condition and that buying AMD altogether is not an option at all!